[horde] ActiveSync with Outlook 2016: Collections not PINGable

[Volker Then]

Hi,

now that I have Outlook 2016 with Horde running, I have already a  
problem with the first set-up. IMAP folders and subfolders are not  
getting synced with resulting log entries like

539][2018-01-30T14:25:43+01:00] INFO: COLLECTIONS: Initializing state  
for collection: Trash, synckey: {5a705f6b-ae88-431a-9e75-3084ac1f0164}3
[539][2018-01-30T14:25:43+01:00] NOTICE: COLLECTIONS: Skipping  
F46d058b1 because it is not PINGable.

Only things that got synced are Inbox, Calendar, Tasks, Contacts, Notes.

Corresponding error messages in the horde.log are only like this:

2018-01-30T14:30:29+01:00 EMERG: HORDE Allowed memory size of  
536870912 bytes exhausted (tried to allocate 603979776 bytes) [pid  
2819 on line 1090 of "/usr/share/php/Math/BigInteger.php"]

If I expand the php memory limit, it got exhausted too.


I already deleted the device in horde's activesync setting, which had  
no effect on the sync behaviour. Syncing with an iOS device is working.

Thanks in advance for any help

Volker